A System.Reflection.MethodInfo object representing the Set method for this property. The set accessor is public.
nonPublic is true and non-public methods can be returned.
null nonPublic is true, but the property is read-only.
nonPublic is false and the set accessor is non-public.
To get the setter of a property, reflect on the property's parent type using Type.GetType or Assembly.GetType, retrieve the Reflection property object from the type, and call PropertyInfo.GetSetMethod.